Magnetic pump



P' 1941- E. M. LIEBERMAN 2,254,432

MAGNETIC PUMP Filed on. 25, 1939 I 2 Sheets-Sheet 1 ll l q' II I'll gdgor M l/bermakz ATTORNEY Sept. 2, 1941. rs. M. LIEBERMAN MAGNETIC PUMPFiled Oct. 25, 1939 a t agar /7 L/berma/z.

2 Sheets-Sheet 2 [N VENTOR A TTORNEY Patented Sept. 2, 1941 a UNITEDSTATES (PATENT OFFICE,

momma rum Edgar M. Lieberman, Merriam. Kans. Application October 25, ms,Serial No. 301,224

' 12 Claims. (01. 109-53) coil ll.

My invention relates to magnetic pumps, and more particularly toapparatus oi that character for supplying treating compoundintermittently and in substantially measured quantity to hot water andsteam systems, or ior other uses: the principal object of the inventionbeing to provide apparatus of this character whereby .liquid compounddrawn from storage may be passed in minor flow to a major flow or otherbody of liquid to be treated in measured quantities under time or othercontrol, insuring desired proportioning oi the treating compound to themain body oi fluid.

In accomplishing this and other objects 01' the invention, I haveprovided improved details 01' structure, the preferred forms of whichare illustrated in the accompanying drawings, wherein: I Fig. l is aside elevation of apparatus embodying my invention, illustrating a formor pump control mechanism selected for conveniently disclosing operationof the pump.

Fig. 2 is a vertical section through'the magnetic pump mechanism.

Fig. 31s a horizontal section through the pump onthe line 9-3, Fig. 2'.

Fig. 4 is a horizontal section throughthe pump ontheline44,Flg.2. F g

Fig. 5 is a side elevation of the pump control mechanism. j

Fig. 6 is a front elevation of the pump control mechanism. a

Fig. 7 is a diagrammatic view of the pump and storage reservoir showinga line for circulation oi. part of the treating liquid through thepumpand reservoir. 1

Referring morein detail to the drawings:

I designates a magnetic pump, including a frame comprising top andbottom plates 2--9 held by bolts 4 passed through tubes 9 between theplates, whereby the plates are retained in spaced relation.

Extending through central apertures in the plates 2-9 is a non-magnetictube 9, and extending about and in spaced relation to the tube 9 is anon-magnetic cylinder I having its upper end located in the aperture inthe upper plate and its lower end seated in an offset 9 in the lowerplate. Located about the cylinder 1, with its ends insulated from plates2-9 by rings 9 and I9, is a The tube 6 projects below the bottom of thelower plate 9 and seats in a cup 12 held to the lower plate 9 by lagbolts l9 extending through the base of the cup and through spacers formsa retaining wall for the lower end of the tube 0, mm threaded sockets inthe bottom a plate 9.

Mounted on the top plate 2 is a cap ll comprising a cylindrical body I9having an integral,

insert skirt II at its lower end depending into the interior of the tube9, an annular flange II at about the upper skirt line seated on the topplate 2 and provided with apertures through which lag bolts l9 areprojected into threaded sockets in the top plate 2 to retain the cap onthe pump frame, and an enlarged ring 29 at its upper end provided withan interior flange 2| having an inset seat 22 at its upper edge.

15 Suspended through a central aperture in the ring 29 is a pump holder29 o! sufliciently less diameter than the cylinder IQ of the cap II toprovide a space 24 within the cylinder and about the pump holder. Thepump holder is held in place by lag bolts 29 which extend through aflange 26 on the upper end of the holder into the ring 29 of the cap li;a gasket 21 being located in an-annular groove 29 in the pump holder andin the seat 22 in the ring 29. A gasket 29 is 10- cated in a downwardlyopening recess 90 in the bottom of flange ll of cap I! and on top ofplate '2 to be engaged by the upper ends of tube 9 and cylinder 1, and agasket 9| is located in the seat in thesuspended cup I: so that when thebolts I9 and I9 are tightened the ends oi the tube 9 are held betweenthe gaskets 29 and 9|, and the ends of the cylinder I between the gasket29 and the bottom of the offset 9 in the lower plate 9 to seal theinterior of the barrel so formed in 5 such a manner as to render itliquid tight.

Seated within the chamber 02 the pump holder is a head 92 of a pumpbarrel 99 projected through the bottom of the pump holder into theinterior of the skirt I! to about the bottom there- 40 of;- the barrel92-99 having a central channel 94 '45 the skirt l1 into the cap chamber24 and through the ports 99 and 96 into the plunger chamber when theports 96 are uncovered upon lowering of the plunger.

A valve body 9I'seats on the barrel head 92 so within the pump holder29, and has a channel 99 registering with the plunger chamber 94. Thevalve body 91 is held to its seat in the holder '29 by a nipple 49,having a lower, exterlorly threaded. collar 4| screwed into the holder29 I4 surrounding the vertical cup flange, which against a gasket 42 ona shoulder 49 in the upper portion of the valve body. The nipple 40 hasan interior chamber 44 communicating with the channel 38 in valve body31 and an outlet channel 45 communicating with the chamber 44 fordischarge of fluidfrom the pump.

Located within the nipple chamber 44 is a valve including a head 46 heldto seat on the top of the valve body 3'! by a compression spring 41which bears on the top of the valve head 46 around a center boss 48 andagainst the top of the chamber 44. A stem 49 depending from the head 46extends into the channel 38 of the valve body, the valve stem 49 havingan axial bore 50 in its lower end connecting with the channel 38, andtransverse ports communicating with the upper end of the bore 50. Theports 5| are closed by the wall of the channel 38 when the stem is atthe lower end of its travel, but open to the chamber 44 in the nipple,when the stem is lifted, as presently described.

Located within the tube 6 is an armature 52 spaced from the wall of thetube to provide fluid passage within the tube about the armature, andhaving exterior longitudinal slots 53 for providing cooling surfaces,obviating large eddy currents and increasing fiow capacity within thetube.

54 designates a plunger operable in chamber 34 and having a head 55seated in"- a-' socket 5B in the top of the armature and held thereto byset-screws 51 extending through apertures 58 in the armature 52 into anannular groove 59 in the head. The upper end of the plunger is spacedfrom the lower end of the valve stem 49 to provide a compression chamber60 in the valve body and head of the barrel, as and for the purposepresently described.

A compression spring 6| surrounds the barrel 33 to bear at its upper endagainst the bottom of the pump holder 23 and at its lower end againstthe top of the armature, to supplement force of gravity in lowering ofthe armature after each discharge stroke.

A supply line 62 provides communication between a treating fluidcompound supply tank 83 and the interior of the tube 6 through a nipple84 on and a port 65 in the cup I2 which supports the armature tube, thesupply line being preferably provided with a cut-oil valve 66, a filter61 and drain valve 68. I

Attached to the nipple 40 at the discharge end of the pump is a-line 69leading to the major flow line III for fluid to be treated, and providedwith a manual control valve II. Interpose'din the lead lines 12 and I3of the coil II is an intermitter or program switch 14, preferablycomprising a bus-bar 15 on a board 18, through which current is passedbetween sections of the line 12.

Also mounted on the board 15 are posts 11 and 18, with which respectivesections of line 13 are connected, as are intermediate wires 19 and 50,leading through amercury switch 8|, pivoted on the board and providedwith a finger 82 having a bearing member 63 engageable by buttons 84 ona disk 85 rotatably mounted on the board and operable through a shaft 86from clock or other operating mechanism indicated at 81. The buttons 84are spaced about the disk to provide desired sequential energization ofthe armature as a solenoid motor and resultant operation of the pumpplunger for supply of treating liquid, and which are setable to providevariation in intermittent supply of the treating liquid.

With the parts of the pump assembled as described, when the mercuryswitch is open, weight of the armature, supplemented by force of thespring 5| retains the armature at the bottom of the stroke, and liquidtreating compound flowing from the supply tank into the tube 5 bygravity fills the tube, runs around the skirt of the cap through thechannel between the cap and pump holder and enters the plunger chamberthrough the ports in the pump holder and barrel head to admit a chargeof the liquid above the plunger, where it is held by the valve 46 due toseating of the valve by its spring 41.

When the operating circuit is closed through the mercury switch inresponse to rocking oi the switch by the intermitter, the armature iselevated in response to energization of its coil, against the resistanceof the spring SI, for litting the plunger 54 to close the ports 36 andlift the charge of treating liquid in the compression chamber 60 overthe plunger, unseating the valve against the resistance of its springand delivering the charge through the valve ports, the upper chamber anddischarge line into the body of fluid to be treated. When the circuit isopened by return of the mercury switch, the coil is de-energized,permitting the armature to return to the bottom of the barrel, and theoutlet valve to reseat, return of the armature lowering the plunger touncover the ports 56 to admit another charge to the compression chamberfor discharge upon a succeeding upward movement of the armature andplunger. Upward movement of the armature creates suction in the tubewhich supplements gravity flow of treating liquid to the tube from thestorage tank.

It is apparent that with the pump mechanism described, accurately anduniformly measured charges are admitted to the plunger chamber fordefinite supply of treating compound to a liquid to be treated, and thatthe supply of compound may be varied by adjustment of the intermitter orits operating mechanism to increase or decrease rate of supply of thecharges from the pump.

In Fig. 7, I have illustrated optional equipment for circulatingtreating fluid through the pump and supply reservoir to cool the pump,consisting of a pipe 58 leading from the annular space 24 within the capcylinder and tube of the pump back to the supply reservoir, throughwhich part of the treating fluid may be displaced from the pump to thereservoir upon each lifting movement of the armature. In such equipmentthe feed line 89 from the reservoir is provided with a check valve 90 toprevent return of fluid to the reservoir under pressure from thedescending armature.

What I claim and desire to secure by Letters Patent is:

1. An electromagnetic pump including a coil, a tube forming an armaturechamber, an armature in said armature chamber, means sealing the chamberfrom the coil, means forming a combined plunger and valve chamber,having port connection with the armature chamber and having a valvedoutlet, a plunger in the plunger chamber, operably connected with thearmature, means for supplying fluid to the armature chamber, a switchcontrolled circuit for the coil, and automatic means for intermittentlyopening and closing the switch circuit.

2. An electromagnetic pump including a fluid tight tube, a coilsurrounding the tube, a combination plunger and valve chamber havingport connection with the interior of the tube, a valve controllingdischarge from said chamber, a solenoid core in the tube responsive tothe coil, a plunger operable by the core, controlling the portconnection with the'interior or the tube to admit measured charges offluid to said chamber and discharge said charges from the chamberagainst resistance of thevalve, means for admitting fluid to the tube,and means for intermittently supplying current to the coil.

3. An electromagnetic pump including a fluid tight tube, a plungercylinder comprising a chamber having port connection with the interiorof the tube, a valve head having a chamber communicating with thecylinder chamber,a valve yieldingly closing the valve chamber, asolenoid core in the tube, a plunger connectedwith the core operable inthe plunger cylinder controlling said port connection with the interiorof the tube to admit measured charges of fluid from the tube to theplunger and valve chambers and deliver said charges against theresistance of said valve, a coil surrounding the tube, and means forintermittently supplying current to the coil.

4. An electromagnetic pump including a tube sealed at its ends toprovide a fluid tight cham ber, a cap having a skirt extending into oneend oi the tube chamber, a pump holder in the cap having an interiorchamber and a port connect-- ing said chamber with the tube chamberthrough the skirt, a barrel in the pump holder having a portcommunicating with the port in the pump holder, a valve body in thechamber of the pump holder having a chamber communicating with theinterior of the barrel, a nipple on said pump holder having an interiorchamber and a discharge port, a valve in the nipple chamber extendinginto the chamber of the valve body and seatable on the valve body, meansyieldingly re-. taining the valve on its seat, a solenoid core in' thetube chamber, a plunger operable in the barrel in response toreciprocation of the core to admit measured charges of fluid to thechamber of the valve body and discharge said charges through the valvechamber-against the yielding resistance on said valve, means foradmitting fluid to the tube chamber, a coil surrounding the tube, andmeans for intermittently supplying current to the coil.

5. In an electromagnetic pump; a solenoid motor comprising a coil, areciprocable armature responsive to intermittent energization of thecoil, and means for intermittently energizing said coil; means forming afluid tight chamber in substantially surrounding relation to thearmature; means for supplying fluid to said chamber; means allowingejection of fluid charges from said chamber in response to reciprocationof said armature, and means for circulating a portion of said fluidbetween said chamber and supply means. v

6. In an electromagnetic pump; a solenoid motor comprising a coil, anarmature, said armature being movable in one direction responsive toenergization of the coil, and means for energizing said coil; meansforming a fluid tight chamber in substantially surrounding relation tothe armature; means for supplying fluid to said chamber; means allowingejection of fluid charges from said chamber in response to movement ofsaid armature in said direction; and yielding means for moving saidarmature in an opposite direction upon deenergization of said coil.

7. In an electromagnetic pump, a coil, a reciprocable member responsiveto intermittent energization of the coil, and means for intermittentlyenergizing said coil, means forming a fluid tight chamber within thecoil and encircling the reciprocable member for containing a body offluid in substantially surrounding relation to the member, means forsupplying fluid to said chamber, a holder mounted on said member chamberhaving a chamber communicating with the member chamber, a barrel mountedon said holder having a chamber therein communicating with said holderchamber, a plunger connected with said member and reciprocable in saidbarrel, and means allowing ejection of fluid charges from the barrelchamber in response to reciprocation of the member.

8. In an electromagnetic pump; a solenoid motor comprising a coil, areciprocable armature responsive to intermittent energization of thecoil, and means for intermittently energizing said coil; means forming afluid tight chamber in substantially surrounding relation to thearmature; means for supplying fluid 'to said chamber; a hollow holdersupported by said chamber forming means and communicating with saidchamber, a barrel mounted on said holder having an end depending intosaid chamber, said barrel having a bore therethrough, a head on thebarrel having a port normally communicat-.

ing said bore with the interior of said holder, a plunger in said boreconnected with said armature adapted to close said port in response toreciprocation of the armature, and means in said holder to allowejection of fluid charges from said barrel bore in response toreciprocation of said armature and plunger.

9. In an electromagnetic pump, a motor, a reciprocable member responsiveto intermittent energization of the motor, means for intermit. tentlyenergizing said motor, means forming a fluid tight chamber insubstantially surrounding relation to the member, means for supplyingfluid to said chamber, a hollow cap communicat-v ing with the chamberand having a skirt depending into said chamber, a hollow holder mountedin said cap, the interiors of said cap and holder being incommunication, a barrel mounted on said holder having an end dependinginto said chamber through said depending end of the cap, s'aid barrelhaving a bore therethrough, a head on the barrel provided with a portnormally communicating said bore with the interior of said cap throughsaid holder, a plunger in said bore connected with said member adaptedto close said port in response to reciprocation of the member, a valvebody on said holder cooperating with the bore of the barrel to form achamber, and a valve in said body to allow ejection of fluid chargesfrom said valve body chamber in response to reciprocation of said memberand plunger.

10. In an electromagnetic pump, a motor, a reciprocable memberresponsive to intermittent energization of the motor, means forintermittently energizing said motor, means forming a fluid tightchamber in substantially surrounding relation to the member, means forsupp ying fluid to said chamber, a hollow cap communicating-with thechamber and having a skirt depending into said chamber, a hollow holdermounted in said cap, the interiors of said cap and holder being incommunication, a barrel mounted on said holder having an end dependinginto said chamber through said depending end 01' the cap, said barrelhaving a bore therethrough, a head on the barrel provided with a portnormally communicating said bore with the interior oi said cap throughsaid holder, a plunger in said bore connected with said member adaptedto close said port in response to reciprocation of the member, a valvebody on said holder cooperating with the bore of the barrel to form achamber, a valve in said body to allow ejection of fluid charges fromsaid valve body chamber in response to reciprocation oi said member andplunger, a nipple on said holder, and means bearing against the nippleyieldingly urging said valve to closed position relative to said valvebody chamber for normally closing the same.

11. In an electromagnetic pump; a solenoid motor mprising a coil, areciprocable armature respoauive to intermittent energization oi themeans for intermittently energizing said cell: means iorming a fluidtight chamber in substantially surrounding relation to the armature;means for supplying fluid to said chamher; a hollow cap mounted on andcommunicating with the chamber and having a skirt depending into saidchamber, a hollow holder mounted in said cap, the interiors of said capand holder normally being in communication, a barrel mounted on saidholder having an end depending into said chamber through said dependingend of the cap, said barrel having a bore therethrough, a head on thebarrel having a port normally communicating said bore with the interiorof said cap, a plunger in said bore connected with said armature adaptedto close said port in response to reciprocation oi the armsture, a valvebody on said holder cooperating with the bore oi the barrel to form achamber, a valve in said body to allow ejection of fluid charges fromsaid valve body chamber in response to reciprocation of said armatureand plunger, a nipple on said holder, and means bearing against thenipple yieldingly urging said said valve to closed position relative tosaid valve body chamber, said valve having ports for communicating thevalve body chamber with the nipple when unseated relative to said valvebody chamber in response to reciprocation oi said armature and plunger.

12. An electromagnetic pump including, a cylindrical chamber, a coilencircling the exterior of the chamber, an armature reciprocable in thechamber and of smaller diameter to provide a fluid passageway about saidarmature, a plunger chamber coaxial with the cylindrical chamber, aplunger in the plunger chamber and having connection with the armature,means forming an annular fluid passageway about the plunger chamber andhaving connection with the plunger chamber, a valve chamber connectedwith the plunger chamber and having a liquid outlet oriflce, a valve inthe valve chamber controlling discharge of fluid from the plungerchamber, means for admitting fluid to the cylindrical chamber at the endopposite the plunger, and means for intermittently energizing the coilto eflect reciprocation of the armature i'or actuating the plunger.

EDGAR M. LIEBERMAN.

